Like England's Balancing Barn, Barbie's four-storey dream mansion (which is being manufactured by Mattel to coincide with the new Barbie's launch later this year) is designed to balance off a steep incline (maybe the Malibu hills?)

While Mattel will sell Architect Barbie's Dream House, it was actually designed by Ting Li and Maja Parklar for a competition to crowdsource the perfect design. And while it's Barbie-pink, it appears to have all the hallmarks of good architecture. It even includes a meditating room, if Barbie has enough time in her diary between lunching with Ken and cocktails with the girls.

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As you will have clocked, Barbie's developed quite an eye for the environment, even if her own lineage isn't so eco-friendly. While it's only a miniature plastic palace, it's been designed to USGBC standards, with a green roof, solar panels and bamboo floors. Plus there's plenty of outdoor space for Barbie's pet giraffe, seemingly. [Architect Barbie competition via Inhabitat]